It is very common to receive the error 0x800ccc0e outlook office 365 message when configuring an email account in Outlook and trying to send an e-mail, the reason why you get the error is because Outlook is not authenticating your account on the server while sending it, so the outgoing mail server rejects the message.

To solve it you simply have to follow the following steps:

Open Outlook and go to: Accounts -> Properties -> Servers.

Once you're on this section, you'll have to mark the option "My server requires authentification".

Now you must write your complete e-mail account and the password you chose while creating it.

Finally press the "Apply" button and the "Accept" button, now you're done configuring the e-mail account in Outlook. Now try to send an e-mail and you shouldn't have any problems doing it, you just solved the error 0x800CCC0E.